[Noisebridge-discuss] how does one debug an lcd screen?

[Mike Schachter]

I'm working under the assumption that the power supply
is busted, so I took the thing apart and pulled out the
board where the power plug goes. This is what it looks
like:

http://imgur.com/a/pbpea#2spwh

I'm not quite sure how to proceed. There's a bunch of
capacitors everywhere. To my inexperienced eye, nothing
looks all that exploded... Should I just take a voltmeter
and measure the resistance of each end of the capacitors?

If one of the capacitors was messed up, would the resistance
be infinite? I'm kind of at a loss because none of this involves
probability distributions, calculus or computing derivatives. The
board doesn't have any equations on it!?! Maybe I could bring
it into circuit hacking Monday?

  mike


On Fri, Apr 29, 2011 at 8:53 PM, Mike Schachter <mike at mindmech.com> wrote:
> Hi there,
>
> So, I'm not the most knowledgeable person on earth when
> it comes to electronics... I took an electronics class once,
> and passed it...
>
> I have an LCD screen, a Westinghouse. Kind of like a TV
> or something. From years ago. It failed on me - it sorta
> powers on, but nothing shows up on the monitor.
>
> Sometimes the ON light just flashes, gradually fading softly
> into the quiet night. It makes me kind of sad. Sometimes I
> wonder if I can bury it in an LCD screen cemetery; would it
> come back to life, only to eviscerate it's hapless owner? My
> final screams should rightfully go unanswered, having toyed
> with things that unknowing humans should not. I'd like to
> avoid that. At least for now.
>
> So... does anyone know how to debug problems with LCD screens?
>
>  mike
>